Affinity Photo is able to paste images from Procreate, but only until you copy something inside AP.
After that, it seems AP takes full control of the clipboard and doesn't allow pasting anything from other apps. The only way around this is to close and restart Affinity Photo.
Additionally any image with transparency pasted from Procreate comes into AP in the full size of the original document. Even if it's a small paint blob in the middle of a transparent canvas. A "trim layer" option would be useful to clean up any pasted layers with transparencies.
